Hair fastening device



FIG. 1 is an isometric front view of the hair fastening device, showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a left side view thereof, the right side view being the mirror image thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof; and,

FIG. 6 is a bottom view thereof. 

The ornamental design for a hair fastening device, as shown and described. 